NL7900945A - PROCESS FOR THE PREPARATION OF NEEDLE-SHAPED FERRIMAGNETIC IRON OXIDES. - Google Patents

PROCESS FOR THE PREPARATION OF NEEDLE-SHAPED FERRIMAGNETIC IRON OXIDES.

Info

Publication number
NL7900945A
NL7900945A NL7900945A NL7900945A NL7900945A NL 7900945 A NL7900945 A NL 7900945A NL 7900945 A NL7900945 A NL 7900945A NL 7900945 A NL7900945 A NL 7900945A NL 7900945 A NL7900945 A NL 7900945A
Authority
NL
Netherlands
Prior art keywords
needle
preparation
iron oxides
ferrimagnetic iron
shaped ferrimagnetic
Prior art date
Application number
NL7900945A
Other languages
Dutch (nl)
Original Assignee
Basf Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Basf Ag filed Critical Basf Ag
Publication of NL7900945A publication Critical patent/NL7900945A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C01G49/06—Ferric oxide [Fe2O3]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70652—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70652—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
    • G11B5/70663—Preparation processes specially adapted therefor, e.g. using stabilising agents
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
NL7900945A 1978-02-09 1979-02-06 PROCESS FOR THE PREPARATION OF NEEDLE-SHAPED FERRIMAGNETIC IRON OXIDES. NL7900945A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782805405 DE2805405A1 (en) 1978-02-09 1978-02-09 PROCESS FOR THE PRODUCTION OF NEEDLE-SHAPED FERRIMAGNETIC IRON OXIDES

Publications (1)

Publication Number Publication Date
NL7900945A true NL7900945A (en) 1979-08-13

Family

ID=6031500

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7900945A NL7900945A (en) 1978-02-09 1979-02-06 PROCESS FOR THE PREPARATION OF NEEDLE-SHAPED FERRIMAGNETIC IRON OXIDES.

Country Status (4)

Country Link
US (1) US4464352A (en)
DE (1) DE2805405A1 (en)
FR (1) FR2416868B1 (en)
NL (1) NL7900945A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014302A1 (en) * 1979-02-03 1980-08-20 BASF Aktiengesellschaft Process for producing needle-shaped highly coercive gamma-iron(III) oxide

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2805621A1 (en) * 1978-02-10 1979-08-23 Basf Ag PROCESS FOR THE PRODUCTION OF NEEDLE-SHAPED FERRIMAGNETIC IRON OXIDES
DE3516885A1 (en) * 1985-05-10 1986-11-13 Basf Ag, 6700 Ludwigshafen METHOD FOR THE PRODUCTION OF NEEDLE-SHAPED, COBAL-CONTAINING FERRIMAGNETIC IRON OXIDS
JPS62167221A (en) * 1986-01-17 1987-07-23 Showa Denko Kk Production of lepidocrocite
JPS62167222A (en) * 1986-01-17 1987-07-23 Showa Denko Kk Production of lepidocrocite
EP0604849B1 (en) * 1992-12-29 1996-10-16 Ishihara Sangyo Kaisha, Ltd. Cobalt-containing magnetic iron oxide and process for producing the same
US5814164A (en) * 1994-11-09 1998-09-29 American Scientific Materials Technologies L.P. Thin-walled, monolithic iron oxide structures made from steels, and methods for manufacturing such structures
US6461562B1 (en) 1999-02-17 2002-10-08 American Scientific Materials Technologies, Lp Methods of making sintered metal oxide articles
DE102006020841A1 (en) * 2006-05-04 2007-11-08 Krause-Röhm-Systeme Ag Process for recovering valuable materials
DE102006020840B4 (en) * 2006-05-04 2010-08-12 Krause-Röhm-Systeme Ag Process for obtaining magnetite

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB675260A (en) * 1948-02-16 1952-07-09 Minnesota Mining & Mfg Improvements in or relating to method of making magnetic material, the magnetic material resulting from said method, and a magnetic record tape or sheet employing said magnetic material
US2900236A (en) * 1955-08-03 1959-08-18 Audio Devices Inc Production of ferromagnetic iron oxide
US3498748A (en) * 1967-05-18 1970-03-03 Pfizer & Co C Preparation of magnetic ferric oxide
GB1392196A (en) * 1971-03-17 1975-04-30 Pfizer Synthetic gamma ferric oxide
GB1385777A (en) * 1971-05-06 1975-02-26 Bayer Ag Magnetic iron oxides and a process for their production
US3904540A (en) * 1972-02-11 1975-09-09 Pfizer Magnetic impulse record member
US3897354A (en) * 1972-04-29 1975-07-29 Bayer Ag Cobalt-containing acicular ferrimagnetic iron oxide of improved remanence stability
US4108787A (en) * 1974-12-20 1978-08-22 Fuji Photo Film Co., Ltd. Process for producing ferromagnetic iron oxide
DE2735316C3 (en) * 1977-08-05 1981-01-29 Basf Ag, 6700 Ludwigshafen Process for the production of acicular, ferrimagnetic iron oxides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014302A1 (en) * 1979-02-03 1980-08-20 BASF Aktiengesellschaft Process for producing needle-shaped highly coercive gamma-iron(III) oxide

Also Published As

Publication number Publication date
FR2416868B1 (en) 1985-11-08
US4464352A (en) 1984-08-07
DE2805405C2 (en) 1988-01-07
DE2805405A1 (en) 1979-08-16
FR2416868A1 (en) 1979-09-07

Similar Documents

Publication Publication Date Title
NL189127C (en) PROCESS FOR THE PREPARATION OF 1,1-ANIMALS.
NL7903117A (en) PROCESS FOR THE PREPARATION OF AMINES.
NL188284C (en) PROCESS FOR THE PREPARATION OF ALFA, BETA-UNSATURATED N-SUBSTITUTED CARBONIC AMIDS.
NL191313C (en) Process for the preparation of p-chloroalkylbenzene.
NL7903688A (en) PROCESS FOR THE WINNING OF POLYPHENYLENE OXIDE.
NL7900615A (en) PROCESS FOR THE PREPARATION OF FLUORBEN ZONITRILES.
NL7900945A (en) PROCESS FOR THE PREPARATION OF NEEDLE-SHAPED FERRIMAGNETIC IRON OXIDES.
NL7903960A (en) MAGNETIC NEEDLE-SHAPED COMPOSITION ON THE BASIS OF IRON OXIDES AND METHOD FOR PREPARING THIS.
NL7903036A (en) PROCESS FOR THE PREPARATION OF PROPENE-ETHENE-BLOCK-COPOLYMERS.
NL7900946A (en) PROCESS FOR THE PREPARATION OF NEEDLE-SHAPED FERRIMAGNETIC IRON OXIDES.
NL7806658A (en) PROCESS FOR THE PREPARATION OF 7,8-DIHYDRO-14-HYDRO-XYNORMORPHINE.
NL7901344A (en) PROCESS FOR THE PREPARATION OF PHALOCYANIN PIGENTS.
NL187577C (en) 3-ACETOXY-9BETA, 11BETA-EPOXY-PREGNA-1,3,5-TRIEN, PROCESS FOR THE PREPARATION THEREOF, AND PROCESS FOR THE PREPARATION OF 6-alpha-halogen-1,4-diene-3-ones.
NL181923C (en) PROCESS FOR THE PREPARATION OF BETA-AMINOPROPIONAMIDE.
NL7600939A (en) PROCESS FOR THE PREPARATION OF 2,5-DICHLOOR-P-XYLENE.
NL183898C (en) PROCESS FOR THE PREPARATION OF CEFAMYCIN C.
NL7808881A (en) PROCESS FOR THE PREPARATION OF 1,1,1,2-TETRAFLUOROTHANE.
NL181190C (en) METHOD FOR PREPARING IRON OXIDE.
NL7903251A (en) PROCESS FOR THE PREPARATION OF CEPHALOS SPORINS.
NL7807046A (en) PROCESS FOR THE PREPARATION OF DIAMINES.
NL7902915A (en) PROCESS FOR THE PREPARATION OF KETAZINE.
NL7804406A (en) PROCESS FOR THE PREPARATION OF 1,2-DICHLOROEHANE.
NL7902985A (en) PROCESS FOR THE PREPARATION OF PYROGRAPE SALTS.
NL188524B (en) PROCESS FOR THE PREPARATION OF P-AMINOPHENOL.
NL7612466A (en) PROCESS FOR THE PREPARATION OF 2,6-DIMETHYL -1,3,6-OCTATS.

Legal Events

Date Code Title Description
A85 Still pending on 85-01-01
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
BV The patent application has lapsed